70-200L and extender - DPChallenge Forums

Canon EF 24-70mm f/2.8L USM

12/07/2007 10:47:45 PM · #1

I was wondering if anyone has any info on tele extenders. The 70-200 f4L is a tad short, to increase the range I was looking at the canon 1.4 extender. It decreases one stop, is suppose to still autofocus at f4 or lower and supposedly doesn't decrease quality or sharpness.
At $450 australian it certainly seems like a lot of money for what it is (half the price of the 70-200 to begin with).
My questions are -
Are there other brands of these things at a lower price ?
Are they the same quality and do they maintain the quality of original lens (otherwise you are better off with the 70-300 IS) ?
Anyone one had any experience or have any views ?

violinist123

Canon EOS-6D

12/07/2007 11:04:54 PM · #2

I've used the sigma 1.4x tc, works great no problems. Want to sell it actually, but I'm guessing shipping it to Oz would be cost prohibitive.

Canon EF 24-70mm f/2.8L USM

12/07/2007 11:22:56 PM · #3

Does the sigma maintain the same things (autofocus, 1 stop difference, quality etc)? Can it be had for cheaper than the canon ?
Routerguy - I know yours is a full frame (the 5D) but what does it boost the 200 to ?

violinist123

Canon EOS-6D

12/07/2007 11:34:17 PM · #4

I haven't used it in a long time. It sits here in its box. I used it on the 30d with the 70-200 F4L. Autofocus still worked, image quality was fine, you lose one stop, etc. It was much cheaper than the canon as I recall. 5d or 30D, a 1,4x tc boosts the focal length by 1.4x, so 280mm.

awpollard

Canon EOS-5D Mark II

Canon EF 100-400mm f/4.5-5.6L IS

12/08/2007 12:52:50 AM · #5

Kenko Teleplus Pro 300 DG x1.4 TC = same (Hoya...I believe) glass as Tamron/Sigma higher end TCs and costs less. Way cheaper than Canons w/o the lens restrictions. Works great with the 70-200mm 4L.

jschro

Canon EOS-30D

Canon EF 24-70mm f/2.8L USM

12/08/2007 01:41:30 AM · #6

I would agree with the Kenko pro 300 mentioned above. I have one and it works great with my 70-200 2.8. Having a 1.6 crop sensor and 1.4 TC will give you effectively 448mm if I'm not mistaken.

Canon EF 70-200mm f/2.8L IS USM

12/08/2007 02:22:08 AM · #7

Are the Kenko's available in Australia ? (I haven't heard of that brand). Does the 70-200 f4 L (with converter) still outperform the 70-300IS ?

roba

Canon EOS-5D Mark II

12/08/2007 05:50:29 AM · #8

Two recent similar threads: 1 & 2